"David" wrote
| How isolated? is there anywhere for boiling water and steam to
| (safely) go? Just think what happens in a power cut with the
| Rayburn running, the valves shut isolate the rayburn which
| even if you shut it off straight away is a gert big lump
| of cast iron with *a lot* of stored heat and no water
| flow through it...
| But I also (now) see your point about the system shutting down
| in a power cut. It is still possible to manually open the valves
| with the lever (I think - I'll have to double check that!)....
| Nipping into the loft during the occasional power cut isn't a
| hardship. Everytime I want to use the rayburn is.

But what about if the power cut occurs when you aren't in the property (or
possibly worse, when you are in it and asleep)?

Owain